INFO: task syz-executor:6496 blocked for more than 147 seconds. Not tainted 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:6496 tgid:6496 ppid:6488 task_flags:0x400140 flags:0x00000010 Call trace: __switch_to+0x404/0x778 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x13b0/0x28d4 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6860 wb_wait_for_completion+0x150/0x280 fs/fs-writeback.c:216 __writeback_inodes_sb_nr+0x1b0/0x218 fs/fs-writeback.c:2747 writeback_inodes_sb_nr fs/fs-writeback.c:2764 [inline] writeback_inodes_sb+0x78/0x8c fs/fs-writeback.c:2779 sync_filesystem+0xa0/0x218 fs/sync.c:54 generic_shutdown_super+0x70/0x2b8 fs/super.c:621 kill_block_super+0x44/0x90 fs/super.c:1710 kill_f2fs_super+0x2b8/0x584 fs/f2fs/super.c:5032 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1435 __cleanup_mnt+0x20/0x30 fs/namespace.c:1442 task_work_run+0x1dc/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x16c/0x1ec arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xb0/0x150 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 1 lock held by kthreadd/2: 3 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/14: 4 locks held by kworker/1:1/26: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff800097727bc0 (reg_work){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000f2688768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6092 [inline] #3: ffff0000f2688768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_process_self_managed_hints+0xc4/0x1c0 net/wireless/reg.c:3209 1 lock held by khungtaskd/32: #0: ffff80008f4e7d20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 2 locks held by kworker/R-write/34: 1 lock held by khugepaged/37: 3 locks held by kworker/u8:2/44: 3 locks held by kworker/u8:3/45: 1 lock held by pr/ttyAMA0/46: 3 locks held by kworker/u8:4/131: 3 locks held by kworker/u8:5/321: 3 locks held by kworker/u8:6/593: 7 locks held by kworker/u8:7/2017: 3 locks held by kworker/u8:8/2061: 3 locks held by kworker/u8:9/2080: 3 locks held by kworker/u8:10/2191: 3 locks held by kworker/R-ipv6_/4142: #0: ffff0000d2cd4148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a1ab7ba0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 6 locks held by kworker/R-bat_e/4223: 3 locks held by kworker/R-ext4-/6072: #0: ffff0000d7daf148 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff80009d6f7ba0 ((work_completion)(&ei->i_rsv_conversion_work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff0000d82f4950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xe4c/0x10dc fs/jbd2/transaction.c:442 2 locks held by syslogd/6091: 2 locks held by udevd/6106: 1 lock held by dhcpcd/6159: 1 lock held by dhcpcd/6160: 2 locks held by getty/6244: #0: ffff0000d78a10a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b5cb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa0 drivers/tty/n_tty.c:2222 1 lock held by syz-executor/6477: 1 lock held by syz-executor/6490: #0: ffff0000c8b980e0 (&type->s_umount_key#50){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff0000c8b980e0 (&type->s_umount_key#50){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff0000c8b980e0 (&type->s_umount_key#50){++++}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505 4 locks held by syz-executor/6494: 1 lock held by syz-executor/6496: #0: ffff0000c28b60e0 (&type->s_umount_key#50){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff0000c28b60e0 (&type->s_umount_key#50){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff0000c28b60e0 (&type->s_umount_key#50){++++}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505 3 locks held by kworker/1:5/6501: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a43a7bc0 ((work_completion)(&sbi->s_error_work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff0000d6178088 (&sbi->sb_lock){+.+.}-{4:4}, at: f2fs_down_write fs/f2fs/f2fs.h:2213 [inline] #2: ffff0000d6178088 (&sbi->sb_lock){+.+.}-{4:4}, at: f2fs_record_stop_reason fs/f2fs/super.c:4152 [inline] #2: ffff0000d6178088 (&sbi->sb_lock){+.+.}-{4:4}, at: f2fs_record_error_work+0x5c/0x178 fs/f2fs/super.c:4304 1 lock held by udevd/6506: 2 locks held by kworker/0:3/6540: 1 lock held by syz.1.42/6764: #0: ffff0000ef9160e0 (&type->s_umount_key#49/1){+.+.}-{4:4}, at: alloc_super+0x1a0/0x80c fs/super.c:344 2 locks held by kworker/u8:11/6784: =============================================